Up for sale is a very nice pair of Amperex Bugle Boy 6DJ8 ECC88 preamp tubes from 1960 with Large O Getter!

Both have matching production codes and perfect silk screen.

Production codes:

Tube #1 GA3 Delta OC 0 27

Tube #2 GA3 Delta OC 0 27

All tubes tested at NOS level when I purchased them earlier this year. Their emissions measured at 120, 120 & 120, 120 (full scale) on a calibrated B&K 707 tube tester. Both tubes also tested negative for shorts or gas. This set was pulled from a precision test instrument that had been sitting idle since 1960 so they are in excellent condition! I put on no more than 5 hour total on this set. They sound very sweet and silky smooth in my audio chain (macbook air > bifrost > lyr > he-500).